Codd Rules in Oracle PL SQL Interview Questions And Answers For Experience & Freshers | Interview Preparation

Codd Rules in Oracle PL SQL Interview Questions And Answers For Experience & Freshers | Interview Preparation


E.F. Codd introduced 12 rules for all relational database products :

1) Information rule

2) Guaranteed access rule

3) Systematic treatment of null values

4) Active online catalog based on relational model

5) Data sub language rule

6) View updating rule

7) High level insertion, updation, deletion

8) Physical data independence

9) Logical data independence

10) Integrity independence

11) Distribution subversion rule

12) Non subversion rule

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